1. Introduction to the Cell
Cell theory
Cell structure
Cell types
quiz
video
lecture
lab 1: microscope, onion, cheek draw
lab 2: video, make microscope
worksheet

2. Cell Theory
The invention of the microscope about 300 years ago led to the discovery of the cell and the formulation of the cell theory :
All organisms are made up of one or more cells
The cell is the basic unit of all organisms
All cells arise from pre-existing cells
Microscope
Cell theory
Cells
Basic unit
Pre-existing

3. Cell Structure Part 1 All cells contain these common components:
Cell membrane is a double layer of lipid that surrounds the cell, it is used for protection, transportation and communication
Cytoplasm is the stuff inside the cell membrane
Cytosol is the fluid part of the cytoplasm
DNA is the genetic material of a cell
Cell membrane
Cytoplasm
Cytosol
DNA

4. Cell Structure Part 2
Some cells also have components called organelles meaning “little organs”
Nucleus stores and replicates the cell’s DNA
Endoplasmic reticulum is a larger network of tubes that produces and modifies chemicals
Golgi body is a smaller network of tubes that modifies and delivers chemicals
Organelles
Nucleus
Endoplasmic reticulum
Golgi complex

5. Cell Structure Part 3 Ribosome makes proteins
Lysosome breaks down chemicals
Mitochondria uses respiration to release energy
Chloroplast uses photosynthesis to store energy in plants
Centrosome directs transport and cell division
Vacuole stores chemicals
Ribosomes
Lysosome
Mitochondria respiration
Chloroplast photosynthesis
Centrosome
Vacuole

6. Cell Types Bacteria Animal Plant Type Prokaryotic Eukaryotic Size
Small 1-10 μm
10-100x larger
Organelles No
Yes
Organization
Unicellular
Multicellular
External Structures
Flagella and capsule
Cilia
Cell wall